maintain.... competition will catch up and/or will do it better for a lower cost. It took years for other companies to get close to iphone performance. But now Apple is entering an established market already where fb is throwing big bucks.
Also a lot of FBs efforts seemed to be around their whole Metaverse play which is a step beyond just making a good VR/MR headset. The Quest headset seems to be doing pretty well if not the explosive world eating unicorn that companies are always reaching for.